Wire-bending mechanism



Oct. 14,1930.

D. KONDAKJIAN WIRE BENDING MECHANISM Fil'd Oct/16, 1929 2 Sheets-Sheet 1 ATTORN EY Oct. 14, 1930. D. KONDAKJIAN 5 WIRE BENDING MECHANISM Filed Oct. 16, 1929 2 Sheets-Sheet 2 i T mmm zw I 2/ ,7"; I I 1.1 v2 IIIIIIIIIIIII/ R .z 7 1 INVENTOR 1| jdgfei o iZdZ/ilg 6. u 4 Z 7 WATTORNEY Patented Oct. 14, 1930 rice DANIEL KONDAKJ'IAN, OF NEWARK, NEW JERSEY WIRE-BENDING MECHANISM Application filed October 16, 1929. Serial No. 399,921.

This invention relates to machines for making wire formations; and the invention has reference, more particularly, to an automatic machine for making anchor hooks for filament wires of incandescent electric lamps,

radio tubes and the like.

In my copending application Serial No. 382,525, filed July 31, 1929, I have shown a machine for making wire formations such as support wires for filaments of incandescent lamps, radio tubes and the like. The present invention relates to improvements in said machine and especially in the forming or bending dies thereof, whereby the machine is adapted to produce bottom or anchor hooks for lamp and tube filaments.

Other objects of this invention, not at this time more particularly enumerated, will be understood from the following detailed description of the same.

An illustrative embodiment of the instant invention is shown in the accompanying drawings, in which Fig. l is a front end elevation of the machine equipped with the novel forming or bending dies of this'invention; Figs. 2 to 5 inclusive are enlarged fragmentary horizontal sections on line m0e in Fig. 1, respectively showing various successive steps or stages in the operation of said novel forming or bending dies of this invention; and Fig. 6 is a side elevation of a completed wire formation or anchor hook produced by said novel forming or bending dies of this invention.

Similar characters of reference are employed in the hereinabove described views, to indicate corresponding parts.

Referring to the drawings, the reference character 1 indicates the frame of the machine, and the machine includes means for automatically feeding wire from a supply thereof to forming or bending dies, which is the same as described and shown in my aforesaid copending patent application, Serial No. 882,525,fi1ed July 31,1929. The machine includes a driven shaft 3.

Supported at the front end of the machine are a pair of laterally spaced head blocks 16. Formed in the upper portion of each head block is a horizontally disposed guideway 17.

Arranged intermediate the head blocks 16 are holding blocks 21 and 22 between which is retained, in operative relation to the bending dies, a wire guiding, and supporting means. This wire guiding .and supporting means, in preferred form, comprises a body member 23 having in its inner face a V-shaped wire guide groove, and a cover plate 27. Said body member and cover plate are secured between said holding blocks 21 and 22 and held against movement by a set-screw 28.

The means for actuating the bender member 18 comprises a pivoted lever 57, the upper end of which is operatively connected with said bender member 18 by a ball and socket connection 58. Said lever is vertically disposed for oscillation in transverse vertical plane on a fulcrum pin 59 which is fixed in the right head block 16, and said head block 16 is cut away on its outer side to form a receiving space 60 for said lever. The lower end of said lever is provided with a roller stud 61 which is operatively engaged by a cam 62 fixed up on and driven by said shaft 3. The upper end of said lever 57 is biased to initial'outwardly swung position by a spring 63 which is mounted in the head block 16, while at the same time the lower end of the lever is normally inwardly swung to maintain the roller stud 61 in the path of the cam 62.

In like manner the bender member 18 is actuated by a similarly mounted lever 64, having at its upper end a ball and socket connection 65 therewith, and having at its lower end a roller stud 66 operatively engageable by a cam 67, also fixed on and rotated by said driven shaft 8. Said lever 64 is also biased to normal initial position by a spring 68.

In the operation of the machine, the wire W is fed to and through the wire guiding and supporting means, so that the free end thereof projects outwardly from the latter and between the bending dies carried by said bender members, in the same manner and by the same means described and shown in my copending application for Letters Patent heretofore mentioned. The forward end of ihewire extendsbetweenthe initially separated bending dies 19 and 20 to a point forward- 1y spaced form the outer end of the wire guiding and supporting means, at which point is located a wire cutting and severing means. This latter means comprises a supporting member 52 to which is adjustably secured a fixed cutter blade 53. Vertically reciprocable in a suitable guide provided by a plate 54, secured to the machine frame work, is a movable cutter blade 55. which moves into and out of cutting relation to the aforesaid fixed cutter blade 53. Properly timed actuation of said movable cutter blade is pro duced by means of a cam 56 which is fixed on and rotated by said driven shaft 3. After the bending dies have operated, the wire feeding mechanism advances the wire relative to the cutting means, which latter means thereupon operates to sever the bent wire formation for discharge from the machine, while at the same time leaving an end portion of the fed wire projecting from the wire guiding and supporting means, and subject to the next cycle of bending die operations.

In the operation of the bending dies 19 and 20, the relative movements of the same are such that the bending die 19 operates with a leading movement before the advancing movement of the bending die 20 occurs. in other words the bending die 19 is 'rst moved to wire bending position and then is caused to dwell in its wire bending position until the bending die 20 engages the wire and produces its initial bending eil'ect thereupon. lhisis accomplished by so shaping the cam (52 that it leads the cam 67 and by further providing a dwell surface 62 whereby said primary bending die actuating mechanism is held stationary while the second bending die advances and gains its wire engaging position, whereupon the primary bending die is retracted while the second bending die is completing its work.

The second bending die 20 is pivotally connected at its rear end, by a pivot pin 20, to the bender member 18, so that the same is capable of swinging movement in horizontal plane. Aiiixed to and projecting from the inner side of said bending die 20 is an oilsetting pin 2%, having a cha-mfered extremity 2 1 which. when the bender member 18 and bending die 2.0 are retracted, rides on the face of said block 22. A leafsprine anchored to the bender member 18. bears against the outer face of the bending die zLU and yieldably urges the same inward, with its cit-setting pin engaged with the face of the blocl: Formed in said block 22, in the path or" movement of said off-setting pin 2 1, across the face of said block 22 when the bending die 20 is advanced, is a receiving socket 526, into which said oii-setting pin may drop to permit, at the proper moment, inward swinging movement oi? said bending die 2-0. Said bending die 20 is provided. at its free end with an inwardly olt-set nosing 20", having a wire engaging face a in longitudinal plane, and a second wire engaging face 5 in transverse plane.

in big. 2 the bending dies 19 and 20 are shown in their retracted initial positions. hen said bending dies are actuated, the die 19 is moved forward, whereby its free end engages the end portion of the wire W project g from the wire guiding and supporting means, and thereupon bends such end portion to the leiit and at right angles to the main bof" oi? the wire, as shown in Fig. 3 at the drawings. Following such operation of the die '15), the die 20 is advanced while "ained in outwardly swung or olif-set hi. due to the engagement of the oi'tpin 24.- with the Face of the block its thus ol'llset, said die 20 is advanced until. the lon itudinal i; e a of its nosing 20 passes over the outer side of the initially bent end portion of the wire. By the time such relation of the nosing 20 to the initially bent end portion oi the wire is attained, the oil setting pin 24.- will be carried, by the advance oi the die 20, into alignment with the receivsocl et 26 of the block s that it may enter the same, thus freeing the die 20 for inward swi ging movement under the pressure of the leaf spring As the die 20 thus swings inward, the face a o1 the nosin 20 engages and turns inwardly the initiatly bent end n :tion of the wire. as shown in Fig. 4.- of the drawings. Completi n of the forward stroke of the die 20 marries the face 6 of its nosing 20 into e :"eincrt with the doubled bacl wire, and esses the same against the adjacent face of the wire guiding? and suj'iporting mea s. thus completing the bend adapted to produce the desired shape of wire 'i ormatioufi being shown in Fig. 5 of the drawings. The dies are now retracted and the chamfered end 524- of the oli n pin 2d of die 20 w ll be carried against a chanrfercd lip 96 with whi h he receiving! soclret provided. so that the ill-setting nin will ride but at the socket to swing the 20 to normal out 'ard v off-set 1: tion as the die is retracted to inactive initial position.

n withdrawal ot the dies 1.) and 20, the wir feeding mechanism again operates to ad- Vance the w re relative to the wire cutting means, whereby the bent formation is severed from the main body of the wire and discharged from the machine, whereupon the IOU Ill)

above described operations are repeated, so that the desired wire formations are auto matically and successively produced during continuous operation of the machine.

The completed wire formation is shown in Fig. 6 and comprises a post of suitable length having the doubled back hookbent at its upper end. Such wire formations are utilized as anchor hooks for retaining the lower loops of filament wires in incandescent lamps, radio tubes and the like in position, and in the manner familiar to those skilled in the art of such lamp and tube construction.

As many changes could be made in the above described construction, and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim 1. In a machine or" the kind described, a pair of opposed reciprocable bending dies comprising a primary die and a secondary die, a wire guiding and supporting means in juxtaposition to said bending dies, means for reciprocating said dies in timed relation, said primary die first operating to produce a right angle bend in wire projecting from said guiding and supporting means, means to normally oil-set said secondary die to initial position whereby when advanced the same may engage over the wire as first bent by said primary die, means to release said secondary die for inward swinging movement whereby the partially bent wire is further bent back into desired hook form, and spring means for producing said inward swinging movement of said secondary die.

:2. In a machine of the kind described, a pair of opposed reciprocable bender members, one of said members having a primary die fixed at its free end. the other of said members having a pivoted secondary die at its tree end, a wire guiding and supporting means intermediate said bender members and their dies, means for reciprocating said bender members and their dies in timed relation, said primary die first operating to produce a right angle bend in wire projecting from said guiding and supporting means, said secondary die having at its inner side a laterally projecting oil-setting pin, means contiguous to the path of reciprocable movement. of said secondary die engageable by said pin to hold said die outwardly turned to an initial position whereby when advanced the same may engage over the wire as first bent by said primary die, said latter means having a receiving socket into which said oil-setting pin trips to permit inward swinging move ment of said secondary die whereby the partially bent wire is further bent back into desired hook form, and spring means for producing said inward swinging movement of said secondary die.

3. In a machine of the kind described, a pair of opposed reciprocable bender members, one of said members having a primary die fixed at its free end, the other of said members having a pivoted secondarydie at its free end, a wire guiding and supporting means int rmediate said bender members and their dies, means for reciprocating said bender members and their dies in timed relation, said primary die first operating to produce a right angle bend in wire projecting from said guiding and supporting means, said secondary die having at its inner side a laterally projecting oil-setting pin, means contiguous to the path oi recipro "able movement of said secondary die engageable by said pin to hold said die outwardly turned to an initial position whereby when advanced the same may engage over the wire as first bent by said primary die, said latter means having a receiving socket into which said oil-setting pin trips to permit inward swinging movement of said secondary die whereby the partially bent wire is further bent back into desired hook form, spring means for producing said inward swinging movement of said secondary die, and means to sever the produced wire formation from the wire stock fed through said wire guiding and supporting means.

In a wire bending mechanism, opposed reciprocable primary and secondary bending dies, a wire guiding and supporting means intermediate said dies, means to reciprocate said dies so that the advance of the secondary die succeeds the advance of the primary die, and means to cause a timed lateral inward movement of said secondary die during its advancing stroke.

5. In a wire bending mechanism, opposed reciprocable primary and secondary bending dies, a wire guiding and supporting means intermediate said dies, means to reciprocate said diessothat the advance of the secondary die succeeds the advance of the primary die, means to outwardly oil-set said die to initial position spring means urging said die to inward operative position, and means to trip said die for inward movement during its advancing stroke. a

6. In a wire bending machine, a pair of opposed reciprocable bending dies comprising a primary die and a secondary die, a wire guiding and supporting means in juxtapos tion to said dies and cooperative therewith during actuation thereof, oscillatable dies, rotatable cams for actuating said levers, said cams being so related that the one serving to operate said primary die leads the one serving to operate said secondary die and furthermore possesses a dwell section for holding the primary die in actuated position while the secondary die advances to operative position, and means to cause a timed lateral inward movement of said secondary die during its advancing stroke.

'6". In a wire bending machine, a pair of opposed reciprocable bender members, one of said members having a primary die fixed at its free end, the other of said members having a pivoted secondary die at its free end, a wire guiding and supporting means in juxtaposition to said dies and cooperative therewith during actuation thereof, oscillatable levers for reciprocating said bender members and their dies, rotatable cams for actuating said levers, said cams being so related that the one serving to operate the bender member carrying said primary die leads the one serving; to operate the bender member carrying said secondary die and furthermore possesses a dwell section for holding the primary die in actuated position while the secondary die being pivotally connected with the bender member carrying the same, means to olt-set said secondary die to outwardly turned initial position, spring means urging said secondary die to inward operative position, and means to trip said secondary die for inward swinging movement during its advancin g stroke.

8. In a wire bending machine. a pair of opposed reciprocable bender members, one of said members having a primary die fixed at its free end, the other of said members having a pivoted secondary die at its free end, a Wire guiding and supporting means in juxtaposition to said dies and cooperative therewith during actuation thereof, oscillatable levers for reciprocating said bender members and their dies, rotatable cams for actuating said levers, said cams being so related that the one serving to operate the bender member carrying said primary die leads the one serving to operate the bender member carrying said secondary die and furthermore possesses a dwell section for holding the primary die in actuated position while the secondary die advances to operative position, said secondary die being pivotally connected with the bender member carrying the same, means to off-set said secondary die to outwardly turned initial position, spring means urging said secondary die to inward operative position, and means to trip said secondary die for inward swinging movement during its advancing stroke, and means to sever the produced wire formation from the wire stock fed through said wire guiding and supporting means.

In testimony, that I claim the invention set forth above 1 have hereunto set my hand this 30th day of September, 1929.

DANIEn KONDAKJIAN. 

